AS3 Racing Game Flash

I am looking for a basic engine built in Flash/AS3 to support a top down racing style game with upgrades. This project only requires basic art, and does not require sounds or music but does need place holders programmed in for these. A break down of what is required is;

Engine;

* Racing Engine with upgrades

-> racing levels and obstacles

-> 3 x varying difficulty races

* Inventory of cars and parts

-> inventory and upgrade engine

* Additional areas to purchase upgrades

* Opponent AI

Databases;

* Cars

* Modifications

* Race levels

* Upgrade shops

* Upgrade classifieds

* Upgrade System

Scenes;

* Racing Scenes

* Upgrade purchase scenes x 4

* Garage scene

* Race selection scene

* Misc scene x 3

The entire engine must be programmed in AS3/Flash. A milestone payment will be paid when the skeleton program is provided and final payment on a playable engine. Use of free engines or reused code is encouraged. Additional information on programming will be provided on bid.